Copy a Hörmann HSE2 40 (40.685 MHz) remot control

How to copy a Hörmann HSE2 / HSE4 40.685 MHz remote control with a SMG-243 Low frequency 27-40mhz duplicator.
Buy your own duplicator here: s.click.aliexp...
1. Press and hold burtton 1 and press button 2 four times at same time
2. Release 2 buttons till LED flashed once every three seconds
3. Put orignal remote in the front of new remote (about 4-5cm), press the original remote button wich need to be copied until the LED of new remote flash quickly (LED have regular flashes)
4. Press the button of New remote that you want to use
5. If you do not copy successfully, please repeat above steps.

[@hugueshr5380]

Hi, how to open the remote pls ?